Method of and machine for winding coils



May 16, 1939. F. MARTINDELL 2,158,827/

METHOD oF AND MACHINE FOR WINDING coms Filed Mrch 12, l1937 ssheets-sheet 1 24 H 9 /f/ F/./. H 3-1 Hmmm @fo l l 45 I .L 1 f77',

` n 'Ai 2 mi A v wm/fr May 16, 1939. F. MARTINDELL- 2,158,827

` METHOD OF AND MACHINE FOR WINDING COILS Filed March 12, 1937Sheets-Sheet 2 V E? f7 ANDRA/[Y May 16, 1939. F. MARTINDELL 2,158,827METHOD OF AND MACHINE .FOR WINDING CILS I Filed March 12, 1937 3Sheets-Sheet- 3 Patented May 16, 1939 uNlTEp STATES METHOD or ANDMACHINE ron WINDING coins Frank Martindell, Western Springs, Ill.,assigner to Western Electric Company, Incorporated, New York, N. Y.,a'corporation of New York 11 Claims.

This invention relates to a method of and machine for winding coils, andmore particularly to a method of and machine for winding electricalcoils of the type in which superimposed layers of wire are separated bystripsor sheets of insulating material.

An object of the present invention is to provide a simple, inexpensiveand efficient method of and machine for winding electrical coils of theabove mentioned type.

In accordance with one embodiment of the invention there is provided amethod of and machine for Winding such coils, in which the inter leavingmaterial, in strip form, is advanced endwise, longitudinally `of thecoil winding arbor, after which the required length thereof isseveredand then inserted edgewise into the coil being wound.

Other features and advantages of the invention will become apparent fromthe following detailed description when read in conjunction with theaccompanying drawings, in which:i

Fig. 1 is a front elevational view, partially broken away, of a coilwinding machine embodying the invention and by means of which the methodof the invention may be practiced;

Fig. 2 is an enlarged fragmentary vertical section on line 2-2 of Fig.1;

Fig. 3 is an enlarged fragmentary vertical sec 4 30 tion on line 3-3 ofFig. 1;

Fig. 4 is an enlarged fragmentary vertical section on line 4-4 of Fig.l;

Fig. 5 is an elevational view looking in the direction indicated by theline 5--5 in Fig. 4;

35 Fig. 6 is an enlarged fragmentary section taken on line 6--5 of Fig.5;

Fig. 7 is a fragmentary section on line 1-1 of Fig. 5; y

Fig. 8 is a fragmentary section similar to a por- 40 tion of Fig. 7, butshowing the several operating parts in different positions;

Fig. 9 is an enlarged detailed section on line 9-9 of Fig. 1;

Fig. 10 is an enlarged sectional view similar to Application March 12,1937, Serial No. 130,473

reference characters designate corresponding parts in the several views,it will be seen that the machine may comprise, for example, a rectangu-llar box-like frame having spaced parallel end walls IIJ and Il rigidlyinterconnected by a rear 5 wall i2 and a horizontal plate I3. The frame-may bel mounted on the top i4 of a suitable table,

work bench, or the like. Within the forward open portion of the frame awinding arbor i5 is removably carried by suitable chucks i6 and I'i'l0rotatably journalled in the end walls I0 and Il, respectively. The chucki6 is attached to a shaft i9 which may be driven from any suitablesource of power (not shown), whereby the winding arbor may be rotated atthe desired speed. 15 The winding arbor may be of any suitableconstruction, preferably adapted to have attached thereto at spacedintervals the ends vof a plurality of wires 20, 20 leading from acorresponding number of conveniently arranged sup- 20 ply spools (notshown). By means of wire guides (not shown) reciprocated longitudinal/lyof the winding arbor, a series of coils 22, 22 each comprising aplurality of superimposed layers of windings are wound simultaneouslyupon sepa- 25 rated zones of the winding arbor, as shown in Figs. 1 and5.

inasmuch as the construction and arrange ment of the winding arbor andwire guides form no material part of the present invention, furtherillustration and description thereof are believed unnecessary.

The present invention is directed primarily to a simple and eicientmethod of and mechanism for feeding and severing the interleavingmaterial and inserting it between the superimposed layers of windingslof the coils while they are being wound. The mechanism comprises aninterleaving material supply means, a feeding means for intermittentlywithdrawing predetermined lengths of the interleaving material from thesupply means and advancing it endwise, longitudinally of the windingarbor, a severing means for severing the interleaving material intov therequired lengths, a means for receiving the severed lengths of theinterleaving material from the feeding means and inserting them edgewiseinto the coils being wound, and means for actuating t'he several meansreferred to in timed relation with each other and in synchronism withthe winding operation.

The material supply means may comprise, for example, a roll ofinsulating material 24 (Fig. 1),

such as paper or cellulose acetate, in ribbon or strip form, of a widthapproximately or slightly greater than the circumference of the nishedcoils. As shown, the paper roll is mounted for rotation on an arbor 2lsecured to and projecting upwardly and rearwardly from the table top I4.The end wall Il of the frame is provided with an inclined slot 21 (Fig.2) through which the paper strip passes upon being withdrawn from thesupply .oll by the feeding means hereinafter described. Of course, anysuitable mechanism may be employed to prevent overrunning of the supplyroll and maintain the paper strip under tension as it is withdrawn fromthe roll.

'I'he means for intermittently withdrawing p redetermined lengths of thepaper strip 24 from the supply roll comprises a pair of paper grippingfingers 2l and 2! adapted to be reciprocated longitudinally of thewinding arbor Il in line with the paper guiding slot 21. These fingersare carried by a reciprocatory carriage 30 slidable on a horizontal bar3l which is rotatably Journalled in suitable bearings in the endwalls'l0 and Il of the machine frame. The carriage Il) comprises avertical plate-like portion 34 having a circular. aperture 3l (Fig. 4)slidably fitting a cylindrical cam Il. The cam is secured to ahorizontal cam shaft 21 rotatably journalled in the end walls I I and II of the machine frame. A follower ll (Figs. 5 and 6) on the carriage 3lrides in an endless groove 4I) formed in the outer surface ofcylindrical cam Il. The cam groove is an endless track having twochanges of direction. one at each end of the cam, so that the followerIl traverses the groove as the cam is rotated. whereby the carriage Il)together with the paper gripping fingers 2B and 29 is reciprocatedlongitudinally oi' the winding arbor. The cam shaft is driven from theshaft il through an intermediate idler gear 42, as best shown in Fig. 2.The idler gear is carried on a stub shaft 43 journalled in the end 'walll0 of the machine frame. A gear 44 on shaft Il drives the idler gear 42and the latter, in turn, drives a gear 4l fixed to cam shaft 31. l

' Referring particularly to Fig. 4, it will be seen that the lower papergripping finger 2l is rigidly attached to the carriage 30 by two pins41, 41 and a screw 48. The upper finger 29 is pivotally mounted on thecarriage, so that its forward end is movable toward and away from thefinger 28. Both gripping fingers are mounted on the left side of thecarriage (Figs. 5 and 6). The upper nnger is attached at its rear end toone end of a pivot pin 40, the opposite end of which projects from theright side of the carriage where a cam lever M is attached to it, asbest shown in Fig. ll. An angular leaf spring B2 has one end attached tothe free end of the cam lever and its opposite end engages the back sideof a screw I3 fixed to the carriage. The spring I2 thus serves to urgethe forward end of the upper Slipping finger toward the lower grippingfinger.

Secured to the cam shaft 31 adjacent the left end of cylindrical cam Ilis a disc-like cam I4 having a peripheral wedge-like projection Il (Fig.9). Another disc-like cam 51 having a peripheral projection 58 (Fig. 1l)similar to cam I4 is secured to the cam shaft adjacent the right end ofthe cylindrical cam. The cam projection 5I cooperates with a dependinglug U9 (Figs. 4 and 10) on' the upper paper gripping finger 2l tomomentarily open or separate the paper gripping fingers as they approachthe end of their movement toward the left, and cam projection Ilcooperates .with the cam lever 50 (Fig. l1) to momentarily open thepaper gripping fingers as they approach the end of their movement towardthe right. It`

will be obvious, therefore, that the paper gripping nngers are caused toreceive and grip the extended end portion 54 of the paper strip andadvance the strip endwise, longitudinally of the winding arbor; and atthe end of their movement toward the right, the fingers are opened torelease the paper strip. In order to insure a. tight gripping of thepaper strip, the paper engaging portions of the gripping fingers arepreferably formed with internesting serrations, as shown in lii'igs.I 6,7 and 8.

.The means for inserting the paper strip into the coils being woundcomprises a pair of horizontal rollers and 6I arranged parallel to thewinding arbor. These rollers are preferably formed of rubber or the likeand are of a length corresponding to the length of the paper strips tobe introduced into the coils being wound. The lower roller 60 isattached to a shaft 63 which is rotatably journalled at opposite ends inthe end walls l0 and Il, respectively, of the machine frame. Byreferring to the drawings, it will be seen that the lower roller 6|) ispositioned just below the lower paper gripping finger 28 so that thelatter is adapted to travel along the upper surface of the lower roller.

The upper roller il is carried by a shaft which is journalled atopposite ends in the forward ends of pivotal arms 66 and 61,respectively, whereby the upper roller is movable toward and away fromthe lower roller. At their rear ends the arms I6 and 81 are secured tothe bar 3i, which is rotatable in the frame as described above. Each ofthe arms has one end of a coil spring 89 attached to it intermediate itsends (Figs. 3. 9 and l0), and the opposite ends of the coil springs areattached to the rear wall i2 of the machine frame. The upper roller isthereby urged downwardly toward the lower roller.

Attached to the upper roller carrying arm l1 intermediate its ends anddepending therefrom is a lug or cam follower 1i (Fig. 3) adapted to beengaged by a disc-like cam 12 secured to cam shaft 31 adjacent the cam51 (Fig. 6). This cam serves to separate the spring pressed upper roller8| from the lower roller B0 so as to permit free passage of the papergripping fingers between the rollers. The .cam is substantiallycircular, but has a fiat portion 13 (Fig. 3) designed and arranged sothat the cam is ineffective when the paper feeding fingers are at theright hand end of their travel, as shown in Fig. 7.

A torsion spring 15 on the left end portion of the lower roller shaft 83serves to rotate the lower roller in a clockwise direction (Fig. 4). One

end of the spring is attached to a collar 16 keyed to the roller shaftand the opposite end of the spring is attached to an upwardly inclinedridge 11 on the forward edge of the horizontal plate I2 of the machineframe. Rotation of the lower roller under the force of the spring islimited by the engagement of a stop finger 18 on roller shaft .l with astop pin 19 on the end wall Il of the machine frame, as best shown inFig. 3.

Secured to the cam shaft 31 adjacent the cam 12 is a disc-like cam 8|(Figs. 3 and 6) which has a peripheral lug or projection 82. While thepaper gripping fingers are approaching the end of their movement towardthe right, the cam proj ection l2 engages the finger 18 on the lowerroller shaft and cooperates therewith to rotate the lower roller in acounterclockwise direction (Fig. 3). This winds the spring 15 so that itis effective. when the cam projection 82 releases the finger 18, torotate the lower roller in a clockwise direction until the fingerengages the stop pin 19. Fig. 12 shows the relative positions of theparts just described after the spring has been wound and is about to `bereleased. Although the lower roller actually makes less than onecomplete revolution, it is sufficient for inserting the forward edge ofthe paper strip into the bight between the coils being wound and thesupply wires leading thereto, after which the paper strip is wrappedaround the coils by the wires.

Substantially simultaneously with the grasping of the paper strip by thecoils being wound, the rollers 60 and 6| are separated slightly torelease the paper strip. This is accomplished by causing the upperroller to be elevated slightly at the proper time by the engagement of aperipheral cam projection 84 on collar 16 (Fig. 3) with the periphery ofa collarl 85 on upper roller shaft su. i

An inclined shelf 61 is provided between the paper. inserting rollersand the winding arbor for guiding the paper strip into the coils beingwound. As shown, this shelf may be secured to the forwardly inclinedupstanding ridge 11 oi' the machine frame. The top surface of the shelfis substantially tangential to both the lower roller and the windingarbor.

The severing means for cutting the paper strip into the required lengthscomprises a pair of cooperating knives 69 and 90. The upper knife 88 issecured to the forward end of the roller carrying arm 66 so that it ismoved up and down with the upper roller 6i. The lower knife 98 is ofresilient steel and of angular form, and is secured at its lower end tothe end wall lil of the machine frame, as best shown in Fig. 1. It willbe noted that the lower knife has an inclined cutting edge over whichthe paper strip is fed. Due to the resiliency of the lower knife and themanner in which it is mounted, the cutting portion thereof resilientlybears against the left side of the upper knife 89 during the cuttingoperation, thereby insuring a clean cut. An upstanding projection 92 atthe rear upper end of the lower knife remains in contact with the leftside of the upper knife at all times, thus maintaining the knives incutting alignment.

In order that the paper gripping and feeding fingers 28 and 29 mayreceive and grip the extended end 56 of the paper strip, they are movedtoward the left beyond the normal position of the lower knife, as willbe apparent Vfrom Figs. 7 and 8. The cutting portion of the lower knifeis thus deflected by .the lower :linger 28 to the position shown in Fig.8, whereby the endof the paper strip is exposed for gripping engagementby the fingers.

The roller carrying arm 66 which carries the upper knife 89 has atransverse arm or bracket 94 (Figs. 5 and 6) secured thereto or integraltherewith. Two screws 95, 95 are adjustable in the bracket 94 and haverounded end portions which project from the underside of the bracket andare adapted to be engaged by an inclined cam surface 96 on the papergripping finger carriage 30 as the latter approaches the end of itsmovement toward the left. The cam surface 96 cooperates with the screws95 to raise the arm 66 together with the upper knife- 89 sufficiently sothat the knife will not obstruct theY movement of the paper grippingfingers to the extreme left end posit'ion shown in Fig. 8.

It is believed that the operation of the machine will be clearlyunderstood from the following brief description of the operation of theseveral mechanisms above Areferred w. After the ends of the Windingarbor at separated positions thereon, a sheet of paper is wrapped aroundthe arbor to provide an inner liner. for the coils. Power is thenapplied for rotating the shaft i9 from which the winding arbor and camshaft 31 are driven. At the same time, the reciprocatory movement of thewire guides (not shown) is started'. The extent of movement of the wireguides in either direction will, of course, depend upon the length ofthe coils to be wound and the ratio between the speed of the windingarbor and the speed of movement oi' the wire guides will depend upon thenumber of turns per layer of windings. In any case, however, the camshaft I1 should make two complete revolutions for each layer ofwindings, so that one cycle of operation of the paper feeding mechanismis completed for each layer of windings. The cam shaft and the wireguides are driven in timed relation so that the paper gripping andfeeding fingers 28 and 29 are at their extreme right hand end positionat the start of each layer of windings.

eral operating parts of the paper feeding mecha- `nism assume thepositions in which they are shown in Figs. 1 to '7, inclusive, and Fig.9 of the drawings. As illustrated in these figures, a strip of paper hasjust been inserted into the coils and wrapped around the layer ofwindings just completed. As the winding of the new layer of wireproceeds, the upper roller 6i is raised and held separated from thelower roller 60 by the cam 12, as shown in dotted outline in Fig. 3.'I'he paper gripping and feeding fingers 28 and 29, which are nowclosed, are moved toward the left, between the separated rollers, bycylindrical cam 36. Before reaching the end of their movement toward theleft the fingers are opened bythe cam 54, as shown in Fig. l0, and theupper knife 59 is elevated by cam surface 96, as described above, so asnot to obstruct the movement of the open fingers to the position shownin Fig. 8. In moving to this position, the fingers deflect the lowerknife 98 toward the left, as described above. The extended end portion56 of the paper strip is now loosely straddled by the feed ngers. Justbefore the feed fingers start moving toward the right, cam projection 55of cam disk 54 moves out of operative relation with respect to the camfollower portion 59 of the upper finger 29, thereby permitting thefingers to grip the paper strip under the pressure of the spring 52. Thefingers are then moved toward the right, advancing the paper stripendwise, longitudinally of the winding arbor and between the upper andlower rollers 60 and 6|, respectively. In Fig. 7 the fingers are shownat the end of their movement toward the right and the advanced portionof the paper strip is shown in dotted lines.

During the movement of the feed fingers toward the right the upperroller is held separated from the lower roller, first by the engagementof the cam surface 96 with the screws 95 and then by the engagement ofthe circular portion of l cam 12 with the cam follower ll. As thefingers approach the end of their movement toward the right, projection82 on cam 8l cooperates with finger 18 on lower roller shaft 63 to wind'the spring 15. The cam projection 84 on collar 'i6 is at the same timerotated out of roller separating position and the flat portion 'i3 ofcam 12 now permits the lupper roller to drop into clamping engagementwith the paper strip under the pressure of the springs il. At the sametime, the upper knife I9, in moving downwardly with the upper roller,cooperates with the lower knife to sever the advanced portion of thepaper strip.

The severed paper is now clamped between the upper and lower rollersready to be inserted into the coils. Immediately after the paper stripis gripped by the rollers.- the feed fingers are opened to release thestrip by the engagement of cam projection Bl of cam 5l with cam lever 50on the upper feed finger. Upon the completion of the layer of windingsbeing wound. cam projection s2 releases finger 18, whereupon thepreviously wound spring Il rotates the lower roller to insert the paperstrip edgewise into the coils. The cam projection Il separates therollers slightly to release the paper strip as soon as the saxhe isgrasped by the coils, as explained above. This completes one cycle ofoperation of the paper feeding mechanism, which is repeated once foreach layer of windings. Obviously, the cam groove 40 is so designed thatthe feed fingers dwell for a short time at the ends of their movementsin either direction in order to permit the performance of the severaloperations above described.

After the 'desired number of layers of windings have been wound, thewires are severed, the winding arbor is removed and the stick of coilsis removed from the arbor and may be separated into individual coils ina manner well known in the art. After the winding arbor has beenreplaced in the machine and the ends of the supply wires have beenattached hereto, as mentioned above, the machine is ready to windanother stick oi coils.

It should be understood that the invention is not limited to theillustrative embodiment thereof herein disclosed, except as defined bythe appended claims.

What is claimed is:

1. The method of feeding sheet material to a coil being wound, whichcomprises withdrawing the material from a supply thereof. advancing itendwise, longitudinally of the coil, severing a predetermined length ofthe withdrawn material from the supply. and then inserting the severedlength edgewise into the coil.

2. In a winding machine, a winding arbor, means for winding successivelayers oi' strand material upon the arbor, a sheet material supplyroll,v means for withdrawing sheet material from the supply roll and foradvancing it endwise, longitudinaily of the winding arbor, means forsevering a predetermined length of the withdrawn material, and means forfeeding the severed length edgewise toward the arbor and between thesuccessive layers of the strand material.

3. In a winding machine, a winding arbor, means for rotating the arborto wind material thereon, a sheet material supply means, means forreceiving and gripping an end portion of the material from the supplymeans, means for moving the gripping means to advance the materialendwise, longitudinally of the arbor, means for severing a portion ofthe advanced material from the supply, and means for feeding the severedportion edgewise toward the arbor.

4. In a winding machine, a supporting fram a winding arbor rotatablymounted therein, a strip material supply roll mounted for rotation aboutan axis transverse with respect to the axis of rotation of the arbor,means for withdrawing strip material from said supply roll and foradvancing it endwise, longitudinally of the winding arbor, means forsevering a portion of the advanced material, and means for feeding thesevered portion edgewise toward the winding arbor.

5. In a winding machine, a winding arbor, a roller for feeding materialto be wound toward the arbor, a spring for rotating the roller in onedirection and disengageable means for rotating the roller in theopposite direction.

8.111 a winding machine, a winding arbor, means for rotating the arborto wind material thereon. a roller for feeding the material toward thearbor, a shaft supporting the roller, a coil spring on the shaft forrotating the roller in one direction, stop means limiting the rotationof the roller in said direction, disengageable means for rotating theroller in the opposite direction, and means operated in timed relationwith the winding arbor for actuating the disengageable means.

7. In a winding machine, a winding arbor, a'

pair of cooperating rollers parallel to the arbor, means for advancingsheet material endwise, longitudinally of the arbor and between saidrollers,

means for pressing the rollers into clamping en-,30

gagement with the material, and means for rotating one of said rollersto feed the material edgewise toward the arbor.

8. In a winding machine, a winding arbor, a

pair of rollers disposed parallel to the arbor,

yieldable means urging the rollers toward each other, spring means forrotating one of the rollers in one direction, stop means limiting saidrotation, means for rotating said roller in the opposite direction toenergize the spring means, and

means rendered eective automatically after a predetermined rotation ofsaid roller under the force of the spring means for separating saidrollers against the opposing force oi' the yieldable means.

9. In a winding machine, a winding arbor, strip' material feeding meansmounted for movement longitudinally of the arbor, and means for holdingan end portion of strip material in an extended position along the pathof movement of'.

said feeding means.

l0. In a winding machine, a winding arbor, a sheet material supply roll,means for holding an end portion of the sheet material in an extendedposition in a plane parallel to the Winding arbor...

